休眠和货币精度

我有一个休眠映射,如下所示:

<hibernate-mapping>
    <class name="kochman.elie.data.types.InvoiceTVO" table="INVOICE">
        <id name="id" column="ID">
            <generator class="increment"/>
        </id>
        <property name="date" column="INVOICE_DATE"/>
        <property name="customerId" column="CUSTOMER_ID"/>
        <property name="schoolId" column="SCHOOL_ID"/>
        <property name="bookFee" column="BOOK_FEE"/>
        <property name="adminFee" column="ADMIN_FEE"/>
        <property name="totalFee" column="TOTAL_FEE"/>
    </class>
</hibernate-mapping>    

其中invoicetvo的变量定义为:

private int id;
private Date date;
private int customerId;
private int schoolId;
private float bookFee;
private float adminFee;
private float totalFee;

当我在此表上执行插入操作时,会得到以下错误:

Hibernate: insert into INVOICE (INVOICE_DATE, CUSTOMER_ID, SCHOOL_ID, BOOK_FEE, ADMIN_FEE, TOTAL_FEE, ID) values (?, ?, ?, ?, ?, ?, ?)
50156 [AWT-EventQueue-0] WARN org.hibernate.util.JDBCExceptionReporter - SQL Error: 0, SQLState: 22001
50156 [AWT-EventQueue-0] ERROR org.hibernate.util.JDBCExceptionReporter - Data truncation: Data truncated for column 'ADMIN_FEE' at row 1
50156 [AWT-EventQueue-0] ERROR org.hibernate.event.def.AbstractFlushingEventListener - Could not synchronize database state with session

我试着把管理员的类型改成双倍,但也没用。问题是,Hibernate确实正确地执行了插入操作,将来的select语句可以返回当前的一组值,但是这个错误阻止了我进一步处理这个发票。

bookfee、adminfee和totalfee字段都应该是货币。它们在MySQL数据库中定义为十进制(5,2)。

对于如何解决这一问题的任何帮助都将不胜感激。